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musickatia [10]
3 years ago
14

How do i solve this using the substitution method

Mathematics
1 answer:
lana [24]3 years ago
5 0
First make them one side equation =0
0=-2y+4x+10
0=2y+6x-10 
0=2x
x=0
substituted 0 in any of the original equation 
2y=4(0)+10
2y=10 ....../2
y=5
check 2(5)=4(0)+10 .......>10=10
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Step-by-step explanation:

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In each of the following ,make y the subject and hence find the value of y when a=2, b=3 ,and c=4.
zvonat [6]

Part i


\dfrac{2a-7}{6y} = \dfrac{3b-5}{2c}


y = \dfrac{ 2c(2a-7)}{6(3b-5)} = \dfrac{c(2a-7)}{9b-15}


Substituting,

y = \dfrac{4(2(2)-7)}{9(3)-15} = \dfrac{ -12}{12} = -1


Answer: -1


Part ii


I'm not sure that one's typed in correctly but I'll solve it as written.


3-34y + 2a = \dfrac{3b-5}{2c + 1}


34y  = 3+2a-\dfrac{3b-5}{2c + 1}


y = \frac 1 {34}\left(3+2a-\dfrac{3b-5}{2c + 1} \right)


We're not asked to simplify it so I wont. Substituting,


y = \frac 1 {34}\left(3+2(2)-\dfrac{3(3)-5}{2(4) + 1} \right) = \frac 1 {34}(7-4/9) = \dfrac{59}{306}


Answer: 59/306



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4 years ago
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3 years ago
The cost of renting a car is 55 a week plus.35 mile traveled during that week an equation to represent the cost would be y=55+0.
uysha [10]

Answer:

65 miles

Step-by-step explanation:

y=55+0.35x

77.75 = 55+0.35x

77.75 - 55 = 0.35x

22.75 = 0.35x

22.75 ÷ 0.35 = 0.35x ÷ 0.35

65 = x

x = 65

7 0
3 years ago
Read 2 more answers
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